A multiband printed monopole antenna is presented, operating primarily in the 900 MHz, 2.4 GHz bands, and 5 GHz bands. A coplanar waveguide feed arrangement is deployed, simplifying the antenna structure to a single side of a printed substrate material. Despite the small size of the antenna, a lower-edge frequency of 650 MHz is achieved. An impedance bandwidth of 63% is achieved in the 2.4-GHz band. The low profile antenna presented is potentially suitable for applications in modern mobile and portable radio systems that require operation over widely separated bands, combining multi-band operation with small size and low profile. With the application of a shorting post, the antenna has the potential for reconfigurable applications.